Update handler EB and A9 info

labels.mlb

@@ -1,5 +1,4 @@
-NesMemory:0000-0001:Word_44F9
+NesMemory:0036-0037:Argument_D
-NesMemory:0036-0037:Argument_D
 NesMemory:2000:PpuControl_2000:7  bit  0\n---- ----\nVPHB SINN\n|||| ||||\n|||| ||++- Base nametable address\n|||| ||    (0 = $2000; 1 = $2400; 2 = $2800; 3 = $2C00)\n|||| |+--- VRAM address increment per CPU read/write of PPUDATA\n|||| |     (0: add 1, going across; 1: add 32, going down)\n|||| +---- Sprite pattern table address for 8x8 sprites\n||||       (0: $0000; 1: $1000; ignored in 8x16 mode)\n|||+------ Background pattern table address (0: $0000; 1: $1000)\n||+------- Sprite size (0: 8x8; 1: 8x16)\n|+-------- PPU master/slave select\n|          (0: read backdrop from EXT pins; 1: output color on EXT pins)\n+--------- Generate an NMI at the start of the\n           vertical blanking interval (0: off; 1: on)
 NesMemory:2001:PpuMask_2001:7  bit  0\n---- ----\nBGRs bMmG\n|||| ||||\n|||| |||+- Display type: (0: color, 1: grayscale)\n|||| ||+-- 1: Show background in leftmost 8 pixels of screen, 0: Hide\n|||| |+--- 1: Show sprites in leftmost 8 pixels of screen, 0: Hide\n|||| +---- 1: Show background\n|||+------ 1: Show sprites\n||+------- Emphasize red\n|+-------- Emphasize green\n+--------- Emphasize blue
 NesMemory:2002:PpuStatus_2002:7  bit  0\n---- ----\nVSO. ....\n|||| ||||\n|||+-++++- Least significant bits previously written into a PPU register\n|||        (due to register not being updated for this address)\n||+------- Sprite overflow. The intent was for this flag to be set\n||         whenever more than eight sprites appear on a scanline, but a\n||         hardware bug causes the actual behavior to be more complicated\n||         and generate false positives as well as false negatives; see\n||         PPU sprite evaluation. This flag is set during sprite\n||         evaluation and cleared at dot 1 (the second dot) of the\n||         pre-render line.\n|+-------- Sprite 0 Hit.  Set when a nonzero pixel of sprite 0 overlaps\n|          a nonzero background pixel; cleared at dot 1 of the pre-render\n|          line.  Used for raster timing.\n+--------- Vertical blank has started (0: not in vblank; 1: in vblank).\n           Set at dot 1 of line 241 (the line *after* the post-render\n           line); cleared after reading $2002 and at dot 1 of the\n           pre-render line.
@@ -33,6 +32,8 @@ NesMemory:4017:Ctrl2_FrameCtr_4017:Read (NES - input):\n---4 3210\nRead data fro
 NesMemory:4200:SBX_4200_DataAndRAM:Read tape data byte.\nWrite for RAM banks.\n\n7  bit  0\n---- ----\nAA.. .BBB\n|||| ||||\n|||| |+++- Select RAM bank mapped to $5000\n||++-+---- Unused\n++-------- Select RAM bank mapped to $6000
 NesMemory:4201:SBX_4201_RomAndTape:Read for tape status:\n\n7  bit  0\n---- ----\nABCD ....\n|||| ||||\n|||| ++++- Unused\n|||+------ Unknown\n||+------- Set when in data region during seek??\n|+-------- tape data synched? current data bit? something else??\n+--------- Something to do with $4202.0? decoder disabeld? decoder data ready?\n\nWrite for ROM bank:\n\n7  bit  0\n---- ----\n.... AAAA\n|||| ||||\n|||| ++++- Select 16k ROM bank at $8000-$BFFF\n++++------ Unused
 NesMemory:4202:SBX_4202_TapeCtrl:Read for status:\n\n7  bit  0\n---- ----\n.A.. B...\n|||| ||||\n|||| |+++- Unused\n|||| +---- Power supply not connected (unused on SBX-1)\n||++------ Unused\n|+-------- Shift register ready for next bit? (tape ready?)\n+--------- Unused\n\nWrite for control:\n\n7  bit  0\n---- ----\nA?BC ?DEF\n|||| ||||\n|||| |||+- Data decoding enable?\n|||| ||+-- IRQ enable?\n|||| |+--- Maybe tape audio enable??\n|||| +---- Unknown\n|||+------ Pulse low to clock data bit\n||+------- Pulse low to reset drive controller?\n|+-------- Unknown\n+--------- Output data bit
+NesMemory:44F9-44FA:Word_44F9
+NesMemory:44FB-44FC:Word_44FB
 NesMemory:6000-6001:ScriptStackAddr:The first two bytes of a\nscript always point to the\nstart of the script's stack.
 NesPrgRom:0000:Handler_FE_DrawCharacter:\nDraws a character from the SBX ROM's\ncharset.
 NesPrgRom:0022:L0022
@@ -1335,7 +1336,7 @@ NesPrgRom:63C5:LA3C5_indirect_jsr
 NesPrgRom:63C8:Handler_9C_Toggle44FE:\n---
 NesPrgRom:63D3:LA3D3
 NesPrgRom:63DE:Handler_EC:\nSome scroll math
-NesPrgRom:647B:Handler_EB
+NesPrgRom:647B:Handler_EB_DrawOverlay
 NesPrgRom:648A:LA48A_rts
 NesPrgRom:648B:LA48B
 NesPrgRom:64A4:LA4A4
@@ -1425,7 +1426,7 @@ NesPrgRom:6B30:Handler_AF_StrToArgA:Takes the first byte of the string\nat $0700
 NesPrgRom:6B3A:Handler_B0_ArgAToStr:Takes ArgA+0 and writes it to the\nfirst Word of the string at $0700.
 NesPrgRom:6C83:Handler_A8
 NesPrgRom:6CEE:Handler_F2_InfLoop
-NesPrgRom:6E56:Handler_A9:ArgA DataID (used as a lookup into $6C01)\n\nupdates or restores nametable.\nlooks like it works on a portion\nof the screen, not the full screen.
+NesPrgRom:6E56:Handler_A9_RestoreTiles:ArgA DataID (used as a lookup into $6C01)\n\nupdates or restores nametable.\nlooks like it works on a portion\nof the screen, not the full screen.
 NesPrgRom:6E5F:L6E5F_loop
 NesPrgRom:6E69:L6E69
 NesPrgRom:6E6D:L6E6D:\ndraws some nametable stuff